#preloader { 
position: fixed; 
left: 0; 
top: 0; 
width: 100%; 
height: 100%; 
z-index: 9999; 
background-color: white; 
opacity: .8;
display: flex; 
flex-direction: column; 
justify-content: center; 
align-items: center; 
} 

#preloader-logo { 
width: 300px; 
height: auto; 
}